Tafsir of Ar-Rahman 55:41

يعرف المجرمون بسيماهم

The criminals will be known by their marks, i.e., by special marks that distinguish them. Al-Hasan and Qatadah said, "They will be known by their dark faces and their blue eyes.'' I say that this contrasts to the marks that will distinguish the believers, such as the light that will appear on the parts of the body that they used to wash while performing ablution. Allah said,

فيوخذ بالنواصي واﻻقدام

and they will be seized by their foreheads and feet. meaning, the angels of punishment will bend their heads down to their feet and throw them like this into the Hellfire. Al-A`mash said that Ibn Abbas said, "He will be taken by his forehead and his feet and be broken just as a stick is broken to be thrown into an oven.''

فبٲي آﻻء ربكما تكذبان